Depending on the specific conditions, the sulfur allotropes form several distinct crystal structures, with rhombic and monoclinic S8 best known. Diammonium phosphate Major phosphate fertilizer; sulphuric acid is input for phosphate fertilizer manufacture.
Formed, solid sulphur Sulphur formed to a specific shape, such as prills, granules, pellets, pastilles, or flakes; see prilled sulphur. Frasch process After Herman Frasch, , hot-water sulphur mining process. Hydrogen sulphide Sulphide occurs naturally in mineral ores, oil and coal deposits.
Natural waters containing elevated concentrations of hydrogen sulphide are used for therapeutic baths and have been consumed for medical purposes. Hydrogen sulphide H 2 S , which exists as a colorless gas under normal conditions, has a characteristic odor of rotten eggs and occurs naturally in coal, natural gas, oil, volcanic gases, and sulphur springs and lakes; H 2 S is a central participant in the sulphur cycle, the biogeochemical cycle of sulphur on earth.
Sulphides form an indispensable link in the sulphur cycle the reversible interconversion of sulphide and sulphate in nature. Prills Formed, solid sulphur in spherical shape; produced by cooling molten sulphur with air or water.
Pyrites Pyrites are a common mineral comprised of iron and sulphur compounds. Pyrites include a range of sulphide materials, such as marcasite, pyrite, and pyrrhotite. Roll sulphur Formed, solid sulphur cast into convenient cylindrical sizes; uses include chemical manufacturing, burned for curing, fumigating, and preserving or bleaching effects. Smelting A roasting process to obtain metals from their ores; sulphuric acid is obtained from the process if sulphur dioxide is removed.
Sour crude and gas Petroleum oil and natural gas, respectively, with high content of hydrogen sulphide. Specialty sulphur Prepared or refined grades of elemental sulphur that include amorphous, colloidal, flower, precipitated, wettable, or paste sulphur.
Sulphur Sulfur is the preferred spelling in the United States, but the formal name of The Sulphur Institute is spelled with a "ph. Sulphur dioxide Also referred to as sulphurous anhydride, sulphur dioxide has the chemical formula SO 2. It is produced by volcanoes and in various industrial processes.
Sulphur dioxide, which exists as a colorless gas uder normal conditions, has a characteristic strong odor and is highly soluble in water. Sulphur dioxide is used in many industrial processes such as chemical preparation, refining, pulp-making and solvent extration and also is the feed stock to manufacture sulphuric acid.
Sulphur dioxide is also used in the preparation and preservation of food because it prevents bacterial growth and browning of fruit. Sulphuric acid Sometimes referred to as the "king of chemicals," sulphuric acid is a strong mineral acid with the formula H 2 SO 4.
It is soluble in water at all concentrations. Sulfuric acid has many applications, and is produced in greater amounts than any other chemical besides water. Literature References: Two forms of sulfur of Other sulfur preparations include: washed sulfur , made by treating sublimed sulfur with ammonia and washing with water to dissolve impurities, particularly arsenic; sulfurated lime , the active component of Vleminckx's lotion , made by boiling sublimed sulfur with lime, resulting in formation of calcium pentasulfide and calcium thiosulfate; and sulfurated potash K 2 S x , also known as liver of sulfur , made by heating sublimed sulfur with potassium carbonate.
Review of dermatological applications: C. McMurtry, J. Lin et al. Properties: Sublimed sulfur forms a fine, yellow crystalline powder.
Insol in water, alcohol. Precipitated sulfur forms a very fine, pale yellow, amorphous or microcryst powder. Practically insol in water. Very slightly sol in alcohol. Sulfurated potash forms irregular, liver-brown pieces; dec in air. Sol in water. Therap-Cat: Keratolytic; scabicide.
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